[R] controling the size of vectors in a matrix
hie R users l have the following matrix n=20 m-matrix(nrow=n,ncol=4) colnames(m)=c(treatmentgrp,strata,survivalTime) for(i in 1:n) m[i,]-c(sample(c(1,2),1,replace=TRUE),sample(c(1:2),1,replace=TRUE),rexp(1,0.07),rexp(1,0.02)) print(m) 1.l would like to control the size of the treatment variable eg treatment 1=size 5 treatment 2=size 15. 2. l would also want to control the size of the strata ie in treatment 1 divide the strata in to 2 etc. 3. For the survival time l would like to have treatment 1-strata 1 using a different rate from treatment 2 -strata 2 etc to generate the survival time. the program l used above does nt do this so if you can help thanks - Building a website is a piece of cake. [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] controling the size of vectors in a matrix
hie R users l have the following matrix n=20 m-matrix(nrow=n,ncol=4) colnames(m)=c(treatmentgrp,strata,survivalTime) for(i in 1:n) m[i,]-c(sample(c(1,2),1,replace=TRUE),sample(c(1:2),1,replace=TRUE),rexp(1,0.07),rexp(1,0.02)) print(m) 1.l would like to control the size of the treatment variable eg treatment 1=size 5 treatment 2=size 15. 2. l would also want to control the size of the strata ie in treatment 1 divide the strata in to 2 etc. 3. For the survival time l would like to have treatment 1-strata 1 using a different rate from treatment 2 -strata 2 etc to generate the survival time. the program l used above does nt do this so if you can help - Finding fabulous fares is fun. [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] controling the size of vectors in a matrix
1) Your colnames need 4 elements and not 3 2) Utilize the argument 'n' in your random number generators Your codes could be simplified as: m - cbind( treatmentgrp = sample( 1:2, n, replace=T ), strata= sample( 1:2, n, replace=T ), survivalTime = rexp( n, rate=0.07 ), somethingElse = rexp( n, rate=0.02 ) ) Regards, Adai raymond chiruka wrote: hie R users l have the following matrix n=20 m-matrix(nrow=n,ncol=4) colnames(m)=c(treatmentgrp,strata,survivalTime) for(i in 1:n) m[i,]-c(sample(c(1,2),1,replace=TRUE),sample(c(1:2),1,replace=TRUE),rexp(1,0.07),rexp(1,0.02)) print(m) 1.l would like to control the size of the treatment variable eg treatment 1=size 5 treatment 2=size 15. 2. l would also want to control the size of the strata ie in treatment 1 divide the strata in to 2 etc. 3. For the survival time l would like to have treatment 1-strata 1 using a different rate from treatment 2 -strata 2 etc to generate the survival time. the program l used above does nt do this so if you can help thanks - Building a website is a piece of cake. [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
